Compression-box for oil-presses



IVL. B. GREEN. COMPRESSION BOX FOR OIL PRESSES.

APPLICATION FILED DEC. 3,1919

Patented July 20, 1920. l 2 SHEETS-SHEET I. v .1

INYENTOR,

WITNESSES M. B. GREEN. COMPRESSION. BOX FOR OIL PRFfSSES.

APPLICATION FILED DEC. 3, I9l9.

Patented July 20, 1920.

2 SHEETS-SHEET 2.

m INVENTOR,

wlTNEssl-js MICHAEL B. GREEN, OF MEMPHIS, TENNESSEE.

COMPRESSION-BOX FOR OIL-PRESSES.

Specification of Letters Patent. Patented J l 20 1920 Application filedDecember 3, 1919. Serial No. 342,118.

To all whom it may concern:

Be it known that I,"MIGHAEL B. GREEN, a citizen of the United States,residing at Memphis, in the county of Shelby and State of Tennessee,have invented certain new and useful Compression-Boxes for Oil-Presses,of which the following is a specification.

This invention has reference to compression boxes for oil presses andits object is to provide a structure for the purpose, in which the topof the box is in the form of cast bars, having the advantage of muchcheaper production than has heretofore been the case with structures ofcorresponding output because the necessity of machining is therebygreatly reduced.

In accordance with the invention, the structure is composed of a topsection made up of a series of bars arranged transversely to the lengthof the compression box and joined in side-to-side contact, the barshaving slits or slots in the upper surface merging into channels in thelower surface in such manner as to give exceptionally free drainage, andyet quite effectively holding back the meal, to which condition thematerial is reduced before the extraction of the oil, and which mealsometimes leaks through the press cloth carrying it. Underriding the topportion made up of the bars so joined that said top portion is aneffectively one-piece structure, is a one-piece bottom section withchannels formed in the upper surface, and the two sections are united byscrews or other fastening means so that the combined structure isreadily handled as a unit.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawings forming part of this specification, with the understanding,however, that the invention is not confined v to any strict conformitywith the showing in the drawings, but may be changed and modified solong as such changes and modifications mark no material departure fromthe salient features of the invention as expressed .in the appendedclaims.

In the drawings,

Figurel is a plan view of a compression box, with some parts broken awayand omitted to display more distant parts.

Fig. 2 is an end view of the compression box.

1 Fig. 3 is a bottom plan view of one of the Jars.

Fig. 4; is a side elevation of one of the bars, showing, in crosssection, the junction strips by means of which the assembled bars arejoined into a plate.

Fig. 5 is an elevation of one side of the compression box with parts insection and broken away to display more distant parts,

Fig. 6 is a section on the line 6-6 of Fig. 2.

In the drawings, there is shown a series of bars 1, each of which isaslong as the width of the compression box and is of generally rectangularcross section and may be somewhat wider than thick, although suchlast-named arrangement need not be strictly followed. Each bar 1 has atop portion 2 with a generally flat surface or table extending the fulllength and width of the bar.

The under portion of the bar is in the form of a longitudinal web 3traversed at intervals by cross webs 4, thus dividing the bar intonumerous sections in the direction of the length of the bar on oppositesides of the central web 3. Both the central and cross webs have thesame depth and coincide with the thickness of the bar as a whole. Theweb 3 between the cross webs 4 has channel recesses at 5 eachconstituting an arch rising in the web 3 with the crown of the archbelow the bottom face of the top portion 2 of the bar. The under face ofthe top portion 2 between the cross webs 4:. as well as the oppositefaces of the central web 3, are formed with grooves or flutes (3parallel with each other and with the webs 4, the grooves or flutestrending in a rising direction along the faces of the central web 3 andoutwardly along the under surface of the top 2 to the outer edgesthereof. The flutes between any two adjacent webs 4 are disposed aboutequi-distantly from each other and nearer to one web 4: than the nextweb 4 adjacent to it. Each group of flutes 6 alternates with the likegroup of flutes on the opposite side of the central web. Each flute 6communicates through a slot or slit '7 with the top'surface of the bar,the disposition of such slots corresponding with the arrangement of theflutes so that on the surface of the bar there appear groups of slots orslits with the groups similarly spaced on the same side of the centerline of the barbut with the slits on one side of the center linealternating withthose on the The slits ex-.

other side of the center line. tend from each outer side edge of the barinwardly to a point about coincident with the corresponding face ofthecentral web 3.

The ends of each bar 1 are relatively solid, as indicated at S, and theends 8 are free from cut-away or channeled parts that occur between thewebs l and also between the latter and the ends 8.

In assemblingthe bars 1 into a press-plate, the ends of the bars areplaced upon strips 9 of a length corresponding to the length of thecompleted plate, the bars 1 being in side contact and there held by thestrips 9, to which the bars are joined by rivets 9 or in any othersecure manner whereby the top section of the compression box is made ineffect a one piece structure.

In addition to the bars 9, other bars 10 are countersunk into the sidesof the assembled bars 1, extending throughout or approximatelythroughout, the length of the completed top section. The strips 10slightly taper in cross section, and such taper may be asmuch asindicated in the drawings, Figs. 2 and 4, or may be considerably less intaper, or even may have no taper, but preferably the grooves receivingthe. strips are slightly dove-tailed, and the strips are properly shapedto fit the grooves and are secured to the ends of the bars 1 by screws11 or in any other appropriate manner, the strips 10 serving to increasethe rigidity of the top section as a whole.

The end bars 1 of the series of bars 1 constituting the top section haveslits 7 on one side only, the other side of the bar be ing. plain andsolid except that the channels 5 are carried through the solid portionso as to open at the ends of the plate as a whole. The correspondingchannels or arch openings 5 are all arranged in line throughout thelength of the plate.

There is also provided a bottom section. in the. form of a plate 12which may be coextensive with the top section and the top and bottomsections are joined at the corners by screws 13, so that they may behandled as a single structure. On opposite s'ides of the bottom sectionare channels or rabbets 14 of a size and shape to seat 1 inchwide andone-half inch long, these dimensions having been found topermit thefreeflow of Oll under the pressure used,

about 4500 lbs. per square inch, and at the same time prevent theforcing of the press cloth throu h the slits to the destruction of thecloth. Moreover, slits of about the dimensions stated also hold back theescape of meal to a minimum quantity.

The slits are spaced apart in each bar by a distancewhich.experience hastaught permits the production of numerous slits or slots withoutsufficiently weakening the bar, 1

' lower ends of those slits 7 adjacent to the sides of the grooves 15,the latter have side cut-outs 15 shown in Fig. 1.

The bars 1 may be each cast in one piece and so used with a minimumamount of machine work. The slits 7, on account of their fineness, mustbe cut by saws or other tools. This greatly reduces the amount of laborin completing the bars, and therefore correspondingly reduces the priceat" which the finished article may be placed upon the market. 1

The invention provides an oil-press compression box of superior quality,this being due to the use of slits in place of perforations, and thearrangementof such slits, ano to the rigid construction of the barswhereby extraordinarily heavy pressure is permiss sible without injuryto the bars by bending or otherwise injuriously'affectingthem, andwhereby injury to the press cloth is avoided and escape of the meal fromwhich the oil is extracted is reduced to a negligible amount.

What is claimed is 1. An element of a compression box for oilpresses,comprising an elongated bar of substantially'rectangular cross sectionhaving a with the lower edges of all thewebs in substantially one plane,the side walls of the longitudinal web between the cross webs beingformedwith series of spaced grooves rising along the sides of thecentral web and merging into the under surface of the top portion up tothe outer edges of said top portion, the lower portion ofthe central webhaving transverse openings there- 'through constituting passages, andthe grooves in the under surface of the upper portion of the bar havingslits extending to the top surface of the bar and from the outer edge ofthe bar toward the central portion thereof.

2. An element of a compression box for 7 ing a relatively flat top, alongitudinal centrally-disposed web on its lower surface,

spaced cross webs intersecting the longitudinal web with the lower edgesof all the webs in one plane, the side walls of the longitudinal webbetween the cross webs being formed with series of spaced grooves risingalong the sides of the central web and merging into the under surface ofthe top portion up to the outer edges of said top portion, the lowerportion of the central web having transverse openings therethroughconstituting passages and thegrooves in the under surface of the upperportion of the bar having slits extending through the top surface of thebar and from the outer edge of the bar toward the central portionthereof, saidslits being arranged in groups on opposite sides of the barwith the slits on one side of the bar alternating with those on theother side thereof.

3. An element of a compression box for oil presses, comprising anelongated bar of substantially rectangular cross section having arelatively flat top, a longitudinal centrally-disposed web on its lowersurface, spaced cross webs intersecting the longitudinal web with thelower edges of all the webs in one plane, the side Walls of thelongitudinal web between the cross webs being formed with series ofspaced grooves rising along the sides of the central web and merginginto the under surface of the top portion to the outer edges of said topportion and the lower portion of the central web having transverseopenings therethrough constituting passages, and the grooves in theunder surface of the upper portion of the bar having slits extendingthrough the top surface of the bar and from the outer edge of the bartoward the central portion thereof, said slits being arranged in groupson opposite sides of the bar with the slits on one side of' the baralternating with those on the other side thereof, and all the groups ofslits on the same side of the'bar being closer to one cross web than tothe neighboring cross web between which the group of slits is located.

4. 11-11 element of a compression box for oil presses comprising anelongated bar of substantially rectangular cross section with arelatively flat top, a longitudinally disposed central web on the undersurface of the bar, and spaced cross webs of the same depth as thelongitudinal web, said longitudinal web having channel recesses betweenthe neighboring cross webs rising into the central web and the oppositeside edges of the upper portion of the bar having entering slitsextended toward the mid-portion of the bar to substantially the planesof the side surfaces of the longitudinal web.

5. A compression box for oil presses comprising a top portion composedof a series of connected transverse bars in side to side contact and abottom portion having an area corresponding to that of the top portionand on which bottom portion the top portion is superposed and secured,said bottom portion having longitudinal grooves on its upper surface andthe top portion having recesses matching the grooves and each other toform conduits through the combined structure, each bar having enteringslits in its top portion extending from the edges of the bar toward thecenter line thereof and the bar having webs on its under surfacereaching to the upper surface of the bottom portion and supportedthereby and forming cavities in the combined structure to accumulate andconduct oil expressed from material resting on top portion andescapingthrough the slits into the cavities.

6. An element of a compression box for oil presses comprising anelongated bar of cast metal with longitudinal and cross webs on itslower face and having grooves rising in the opposite faces of thelongitudinal web and merging into the grooves in the under face of andextending to the side edges of the top of the bar, said bar having slitscut through the top of it and ex tending along the grooves in said topfrom the outer edges of the bar to the side faces of the longitudinalweb.

7. An element of a compression box for oil presses comprising anelongated bar of cast metal, with longitudinal and transverse webs onthe under face, the longitudinal web having passages through it betweenthe transverse webs, and the top of the bar having its under face formedwith grooves extending from the outer edges of the bar to thelongitudinal web and merging into grooves in the opposite faces of saidlongitudinal web, and slits cut through the top of the bar and followingthe grooves from the outer edges of the bar to the longitudinal web.

In testimony whereof I affix my signature.

MICHAEL B. GREEN.

